Patriotic young man Xu Wenbin joined the army after graduating from Huangpu, but the army was separated and came to Shanghai. By chance, he encounters Shanghai tycoon Xu Wenqiang being assassinated, so he joins Ding Li to avenge Xu Wenqiang.
Later, classmate Dai Yunong established the Blue Clothes Club, and Wenbin joined, determined to serve the country.
Gangs, governments, concessions, and Japanese spies, Shanghai is a melting pot for games among all parties, and Xu Wenbin skillfully deals with it for his ideals.
The old classmates who fell in love can never let go, but the insidious Japanese female spy is right in front of them...